Introduction | Learning PHP 2023
Hi guys! Welcome to my channel RaymondT.
What is PHP?
PHP is a server scripting language and a powerful tool for making dynamic and interactive web pages
PHP is an acronym for "PHP: Hypertext Preprocessor“
PHP is a widely-used, open-source scripting language
PHP is free to download and use
What are the basic knowledge needed?
Before you continue you should have a basic understanding of the following:
HTML
CSS
JavaScript (optional)
What are the things needed to start our local development?
1. Install a web server, such as Apache
2. Install PHP
3. Install a database, such as MySQL
4. Install a text editor
5. Install a browser
Basic PHP Syntax
A PHP script can be placed anywhere in the document.
The default file extension for PHP files is “.php”
A PHP file normally contains HTML tags, and some PHP scripting code.
PHP Comments
A comment in PHP code is a line that is not executed as a part of the program. Its only purpose is to be read by someone who is looking at the code.
PHP Variables
Variables are "containers" for storing information.
In PHP, a variable starts with the $ sign, followed by the name of the variable
PHP Data Types
Variables can store data of different types, and different data types can do different things.
PHP Operators
Operators are used to performing operations on variables and values.
PHP Display Output
With PHP, there are two basic ways to get the output: echo and print.
The echo and print are more or less the same. They are both used to output data to the screen.
The differences are small: echo has no return value while print has a return value of 1 so it can be used in expressions.
The echo can take multiple parameters while print can take one argument.
The echo is marginally faster than print.
Just keep practicing and never stop learning.
Thank you for watching.
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